llvm-6502/lib/Target/Mips/MipsSEInstrInfo.h
Akira Hatanaka 3e6758541b [mips] Enhance command line option "-mno-ldc1-sdc1" to expand base+index double
precision loads and stores as well as reg+imm double precision loads and stores.

Previously, expansion of loads and stores was done after register allocation,
but now it takes place during legalization. As a result, users will see double
precision stores and loads being emitted to spill and restore 64-bit FP registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190235 91177308-0d34-0410-b5e6-96231b3b80d8
2013-09-07 00:52:30 +00:00

114 lines
4.6 KiB
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//===-- MipsSEInstrInfo.h - Mips32/64 Instruction Information ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the Mips32/64 implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef MIPSSEINSTRUCTIONINFO_H
#define MIPSSEINSTRUCTIONINFO_H
#include "MipsInstrInfo.h"
#include "MipsSERegisterInfo.h"
namespace llvm {
class MipsSEInstrInfo : public MipsInstrInfo {
const MipsSERegisterInfo RI;
bool IsN64;
public:
explicit MipsSEInstrInfo(MipsTargetMachine &TM);
virtual const MipsRegisterInfo &getRegisterInfo() const;
/// isLoadFromStackSlot - If the specified machine instruction is a direct
/// load from a stack slot, return the virtual or physical register number of
/// the destination along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than loading from the stack slot.
virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
int &FrameIndex) const;
/// isStoreToStackSlot - If the specified machine instruction is a direct
/// store to a stack slot, return the virtual or physical register number of
/// the source reg along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than storing to the stack slot.
virtual unsigned isStoreToStackSlot(const MachineInstr *MI,
int &FrameIndex) const;
virtual void copyPhysReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI, DebugLoc DL,
unsigned DestReg, unsigned SrcReg,
bool KillSrc) const;
virtual void storeRegToStack(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned SrcReg, bool isKill, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI,
int64_t Offset) const;
virtual void loadRegFromStack(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned DestReg, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI,
int64_t Offset) const;
virtual bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const;
virtual unsigned getOppositeBranchOpc(unsigned Opc) const;
/// Adjust SP by Amount bytes.
void adjustStackPtr(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
/// Emit a series of instructions to load an immediate. If NewImm is a
/// non-NULL parameter, the last instruction is not emitted, but instead
/// its immediate operand is returned in NewImm.
unsigned loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
MachineBasicBlock::iterator II, DebugLoc DL,
unsigned *NewImm) const;
private:
virtual unsigned getAnalyzableBrOpc(unsigned Opc) const;
void expandRetRA(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned Opc) const;
std::pair<bool, bool> compareOpndSize(unsigned Opc,
const MachineFunction &MF) const;
/// Expand pseudo Int-to-FP conversion instructions.
///
/// For example, the following pseudo instruction
/// PseudoCVT_D32_W D2, A5
/// gets expanded into these two instructions:
/// MTC1 F4, A5
/// CVT_D32_W D2, F4
///
/// We do this expansion post-RA to avoid inserting a floating point copy
/// instruction between MTC1 and CVT_D32_W.
void expandCvtFPInt(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned CvtOpc, unsigned MovOpc, bool IsI64) const;
void expandExtractElementF64(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I, bool FP64) const;
void expandBuildPairF64(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I, bool FP64) const;
void expandEhReturn(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
};
}
#endif